He was emperor at the apogee of the Aztec civilization, the last to complete his rule before the Spanish Conquest. But Ahuizotl’s tomb has never been found. No Aztec ruler’s funeral chamber ever has. But Mexican archaeologists believe that has finally changed.

Using ground-penetrating radar, they have detected underground chambers that could contain the remains of Ahuizotl, who ruled the Aztecs when Columbus landed in the New World.

The find could provide an extraordinary window into Aztec civilization at its peak. Ahuizotl (ah-WEE-zoh-tuhl), was an empire-builder who extended the Aztecs’ reach as far as Guatemala.

Accounts written by Spanish priests suggest the area was used by the Aztecs to cremate and bury their rulers. But no tomb of an Aztec ruler has ever been found, in part because the Spanish conquerors built their own city atop the Aztec’s ceremonial center, leaving behind colonial structures too historically valuable to remove for excavations.

One of those colonial buildings was so damaged in a 1985 earthquake that it had to be torn down, eventually giving experts their first chance to examine the site off Mexico City’s Zocalo plaza, between the Metropolitan Cathedral and the ruins of the Templo Mayor pyramid.

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